Portable battery charger



FIG. 1 is a top view of the portable battery charger in closed position;

FIG. 2 is a left-hand-side view of the portable battery charger in closed position;

FIG. 3 is a front view of the portable battery charger in closed position;

FIG. 4 is a right-hand-side view of the portable battery charger in closed position;

FIG. 5 is a rear view of the portable battery charger in closed position;

FIG. 6 is a bottom view of the portable battery charger in closed position;

FIG. 7 is a perspective view of the portable battery charger in open position while attached to a key ring; and,

FIG. 8 is a reverse perspective view of the portable battery charger in open position while attached to a key ring.

The broken lines showing the key ring are for the purpose of illustrating environmental structure, and forms no part of the claimed design. 

The ornamental design for a portable battery charger, as shown and described. 